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https://github.com/golang/go
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72dec90bfd
Currently, on darwin/arm64 we set up TLS using cgo. TLS is not set for pure Go programs. As we use libc for syscalls on darwin, we need to save the G register before the libc call. Otherwise it is not signal-safe, as a signal may land during the execution of a libc function, where the G register may be clobbered. This CL initializes TLS in Go, by calling the pthread functions directly without cgo. This makes it possible to save the G register to TLS in pure Go programs (done in a later CL). Inspired by Elias's CL 209197. Write the logic in Go instead of assembly. Updates #38485, #35853. Change-Id: I257ba2a411ad387b2f4d50d10129d37fec7a226e Reviewed-on: https://go-review.googlesource.com/c/go/+/265118 Trust: Cherry Zhang <cherryyz@google.com> Trust: Elias Naur <mail@eliasnaur.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
240 lines
3.9 KiB
Go
240 lines
3.9 KiB
Go
// created by cgo -cdefs and then converted to Go
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// cgo -cdefs defs_darwin.go
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package runtime
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import "unsafe"
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const (
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_EINTR = 0x4
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_EFAULT = 0xe
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_EAGAIN = 0x23
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_ETIMEDOUT = 0x3c
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_PROT_NONE = 0x0
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_PROT_READ = 0x1
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_PROT_WRITE = 0x2
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_PROT_EXEC = 0x4
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_MAP_ANON = 0x1000
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_MAP_PRIVATE = 0x2
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_MAP_FIXED = 0x10
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_MADV_DONTNEED = 0x4
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_MADV_FREE = 0x5
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_MADV_FREE_REUSABLE = 0x7
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_MADV_FREE_REUSE = 0x8
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_SA_SIGINFO = 0x40
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_SA_RESTART = 0x2
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_SA_ONSTACK = 0x1
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_SA_USERTRAMP = 0x100
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_SA_64REGSET = 0x200
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_SIGHUP = 0x1
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_SIGINT = 0x2
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_SIGQUIT = 0x3
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_SIGILL = 0x4
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_SIGTRAP = 0x5
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_SIGABRT = 0x6
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_SIGEMT = 0x7
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_SIGFPE = 0x8
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_SIGKILL = 0x9
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_SIGBUS = 0xa
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_SIGSEGV = 0xb
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_SIGSYS = 0xc
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_SIGPIPE = 0xd
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_SIGALRM = 0xe
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_SIGTERM = 0xf
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_SIGURG = 0x10
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_SIGSTOP = 0x11
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_SIGTSTP = 0x12
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_SIGCONT = 0x13
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_SIGCHLD = 0x14
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_SIGTTIN = 0x15
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_SIGTTOU = 0x16
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_SIGIO = 0x17
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_SIGXCPU = 0x18
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_SIGXFSZ = 0x19
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_SIGVTALRM = 0x1a
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_SIGPROF = 0x1b
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_SIGWINCH = 0x1c
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_SIGINFO = 0x1d
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_SIGUSR1 = 0x1e
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_SIGUSR2 = 0x1f
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_FPE_INTDIV = 0x7
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_FPE_INTOVF = 0x8
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_FPE_FLTDIV = 0x1
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_FPE_FLTOVF = 0x2
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_FPE_FLTUND = 0x3
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_FPE_FLTRES = 0x4
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_FPE_FLTINV = 0x5
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_FPE_FLTSUB = 0x6
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_BUS_ADRALN = 0x1
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_BUS_ADRERR = 0x2
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_BUS_OBJERR = 0x3
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_SEGV_MAPERR = 0x1
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_SEGV_ACCERR = 0x2
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_ITIMER_REAL = 0x0
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_ITIMER_VIRTUAL = 0x1
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_ITIMER_PROF = 0x2
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_EV_ADD = 0x1
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_EV_DELETE = 0x2
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_EV_CLEAR = 0x20
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_EV_RECEIPT = 0x40
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_EV_ERROR = 0x4000
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_EV_EOF = 0x8000
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_EVFILT_READ = -0x1
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_EVFILT_WRITE = -0x2
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_PTHREAD_CREATE_DETACHED = 0x2
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_PTHREAD_KEYS_MAX = 512
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_F_SETFD = 0x2
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_F_GETFL = 0x3
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_F_SETFL = 0x4
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_FD_CLOEXEC = 0x1
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_O_NONBLOCK = 4
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)
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type stackt struct {
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ss_sp *byte
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ss_size uintptr
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ss_flags int32
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pad_cgo_0 [4]byte
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}
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type sigactiont struct {
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__sigaction_u [8]byte
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sa_tramp unsafe.Pointer
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sa_mask uint32
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sa_flags int32
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}
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type usigactiont struct {
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__sigaction_u [8]byte
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sa_mask uint32
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sa_flags int32
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}
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type siginfo struct {
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si_signo int32
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si_errno int32
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si_code int32
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si_pid int32
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si_uid uint32
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si_status int32
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si_addr *byte
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si_value [8]byte
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si_band int64
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__pad [7]uint64
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}
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type timeval struct {
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tv_sec int64
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tv_usec int32
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pad_cgo_0 [4]byte
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}
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func (tv *timeval) set_usec(x int32) {
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tv.tv_usec = x
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}
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type itimerval struct {
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it_interval timeval
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it_value timeval
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}
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type timespec struct {
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tv_sec int64
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tv_nsec int64
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}
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//go:nosplit
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func (ts *timespec) setNsec(ns int64) {
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ts.tv_sec = ns / 1e9
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ts.tv_nsec = ns % 1e9
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}
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type exceptionstate64 struct {
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far uint64 // virtual fault addr
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esr uint32 // exception syndrome
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exc uint32 // number of arm exception taken
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}
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type regs64 struct {
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x [29]uint64 // registers x0 to x28
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fp uint64 // frame register, x29
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lr uint64 // link register, x30
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sp uint64 // stack pointer, x31
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pc uint64 // program counter
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cpsr uint32 // current program status register
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__pad uint32
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}
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type neonstate64 struct {
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v [64]uint64 // actually [32]uint128
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fpsr uint32
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fpcr uint32
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}
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type mcontext64 struct {
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es exceptionstate64
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ss regs64
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ns neonstate64
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}
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type ucontext struct {
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uc_onstack int32
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uc_sigmask uint32
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uc_stack stackt
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uc_link *ucontext
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uc_mcsize uint64
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uc_mcontext *mcontext64
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}
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type keventt struct {
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ident uint64
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filter int16
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flags uint16
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fflags uint32
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data int64
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udata *byte
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}
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type pthread uintptr
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type pthreadattr struct {
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X__sig int64
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X__opaque [56]int8
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}
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type pthreadmutex struct {
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X__sig int64
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X__opaque [56]int8
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}
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type pthreadmutexattr struct {
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X__sig int64
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X__opaque [8]int8
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}
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type pthreadcond struct {
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X__sig int64
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X__opaque [40]int8
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}
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type pthreadcondattr struct {
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X__sig int64
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X__opaque [8]int8
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}
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type machTimebaseInfo struct {
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numer uint32
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denom uint32
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}
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type pthreadkey uint64
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